Neuromuscular Eletroestimulation in Torque for Long Distance Recreational Runners

Not Applicable

Completed

• Conditions: Torque
• Interventions: Other: Only Run; Other: NMES and Run

• Registration Number: NCT03653286
• Lead Sponsor: Universidade Cidade de Sao Paulo

Brief Summary

Introduction: The use of neuromuscular electrical stimulation (NMES) in athlete training has become an increasingly common feature among competition teams. Among the main benefits of NMES are the increase in muscular strength and improvement in athletes' performance. Surveys demonstrate the benefits of basketball, volleyball, soccer, swimmers and Olympic lifters using NMES, but no studies have been conducted on runners. Objectives: To evaluate the effects of 6 weeks of training with NMES, on knee peak torque (PT), ventilatory anaerobic threshold, maximum oxygen consumption (VO2max) and running economy in recreational runners. Methods: Randomized clinical trial involving 30 long distance runners, being randomly distributed in 2 groups of 15 participants each. All individuals will perform isokinetic evaluation of the lower limbs and ergospirometry. After these evaluations, all athletes will perform the same running training (CT), in addition to the CT the intervention group will perform NMES on the knee extensors 3 times a week for 15 minutes.

Detailed Description

Participants who meet the eligibility criteria will be invited to participate in the study and, after signing the informed consent form, will perform initial clinical evaluation and will be randomized into two groups, being: control group (CG) and intervention group (GI) - using the medium-frequency alternating current. Each group will consist of 15 subjects who will have as dependent variables, the evaluation of the following items: peak muscle torque, analysis of ventilatory anaerobic thresholds, running economy and maximal oxygen consumption.

The intervention with the NMES will be considered as an independent variable. All groups will have the dependent variables evaluated before and after the intervention, which will consist of 18 sessions (6 weeks). The NMES training will be performed 3 times a week and will never be applied for two consecutive days, as shown in the flowchart All individuals, being they of the CG or the GI will perform a running training (TC), between 15 and 40 km per week and will be guided how to perform them, and the GI patients will perform a muscle strengthening protocol with NMES, which will be carried out in a specific place and prepared for intervention, in addition to the TC.

Study Timeline

• Study First Submitted: 2018-08-26
• Study First Submitted QC: 2018-08-28
• Study First Posted: 2018-08-31
• Study Start: 2018-09-19
• Primary Completion: 2019-07-25
• Study Completion: 2019-09-21
• Status Verified: 2019-10
• Last Update Submitted: 2019-11-02
• Last Update Posted: 2019-11-05

Recruitment & Eligibility

• Status: COMPLETED
• Sex: Male
• Target Recruitment: 30

Inclusion Criteria

• Included will be male individuals, aged 30 to 45 years
• recreational funders, who have been performing the activity for at least 1 year.
• Totaling at least 15km and a maximum of 40km of training per week,
• Who do not use NMES for the purpose of muscle training.

Exclusion Criteria

• Subjects who present muscle injuries and / or joint injuries in the lower limbs (LMI) in the last 6 months can't be part of the study.
• Who are unable to perform the isokinetic test
• Who are unable to do ergospirometric test,
• Who meet the contraindications criteria of NMES

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Only Run	Only Run	Only Run
NMES and Run	NMES and Run	NMES and run

Primary Outcome Measures

Name	Time	Method
Isokinetic dynamometer	6 weeks	The computerized isokinetic muscle evaluation will be performed in the Cybex Norm isokinetic dynamometer (Cybex International, Inc., Ronkonkoma, LI, New York), at the Physiotherapy Clinic of Universidade Cidade de São Paulo (UNICID). The movement performed during the test will be that of isometric, concentric and eccentric extension of the two knees, to measure peak torque, using angulations of 90 to 60 degrees of knee and 3 maximum voluntary contractions.

Secondary Outcome Measures

Name	Time	Method
Racing economy	6 weeks	The running economy on a horizontal treadmill will be measured in 3 speeds in the order indicated: 2.68, 3.13 and 3.58 m · s-1 (9.6, 11.3 and 12.9 km · h-1, respectively). The guy will run for 6 minutes at each speed and rest between runs. The VO2 per minute will be measured during each of the last 3 minutes of each race. The mean of the difference of the 2 values will be used as a measure of the running economy.; The economy will be expressed in meters per milliliter of oxygen consumed per kilogram of body weight (m / ml-1 / kg-1). This unit allows comparisons at various running speeds, and has a conceptual advantage in that the numerical values are directly related to the economy (ie, the higher the number the better the economy).
Analysis of Ventilatory Anaerobic Threshold	6 weeks	The LAVs will be determined from ventilatory equivalents (VE / VO2 and VE / VCO2), final expired fractions (FEO2 and FECO2) and respiratory quotient (QR), and expressed as VO2 (in ml / kg / min). The LAV1 will correspond to the lowest value of EV / VO2 before its continuous increase associated with the beginning of the abrupt and continuous increase of the QR.; The LAV2 will correspond to the point at which the nonlinear increases of VE / VO2, VE / VCO2 and FEO2 will coincide with the decrease of FECO2. Immediately after the 18th training session, the patients will be re-evaluated and submitted to all the procedures described for isokinetic evaluation and ergospirometry.
Maximum oxygen consumption	6 weeks	Prior to the test, subjects will lie down for 10 minutes for initial ventilatory data and heart rate (HR) records. The test protocol will consist of running on a treadmill (ATL Model, Inbrasport Ltda, Brazil), with an initial velocity of 6km / h, followed by increments of 1km / h every 1min until voluntary exhaustion of the subjects.; Ventilatory parameters will be collected during rest and continuously throughout the tests, at each respiratory cycle, and analyzed in averages of 20sec through a computerized gas analyzer (model VO2000; Inbrasport Ltda, Brazil). The gas analyzer shall be calibrated to the volume and standard concentration of gases immediately before the first test of the day and re-calibrated after each test as per manufacturer's standardization.

Trial Locations

Locations (1)

UNICID; 🇧🇷 Sao Paulo, SP, Brazil